One ounce of Gold for the finest suit

The subject line is a rule for estimating the true worth of an ounce of Gold.
So using that criteria my 16-24k is not outlandish:

http://most-expensive.net/mens-suits

Want something a bit finer--or perhaps a whole lot finer? Expect to pay dearly for it, though bear in mind that most of the expense above $5,000 or so is due to the fabric, not the talent of the workmanship. Master tailor and "Power look" avatar William Fioravanti, for instance, charges clients who walk into his Manhattan showroom up to $10,500 to create a bespoke suit in Super 220 merino wool, of which he says $5,000 covers the cost of four meters of cloth--precisely the extra above his entry-level rate. "This year we will sell at least 12 or 13 suits at that price," he notes.